729638149 has 2 divisors, whose sum is σ = 729638150. Its totient is φ = 729638148.

The previous prime is 729638123. The next prime is 729638153. The reversal of 729638149 is 941836927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 729378049 + 260100 = 27007^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 729638149 - 2²⁷ = 595420421 is a prime.

It is a super-2 number, since 2×729638149² = 1064743656952292402, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (729638179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364819074 + 364819075.

It is an arithmetic number, because the mean of its divisors is an integer number (364819075).

Almost surely, 2^729638149 is an apocalyptic number.

It is an amenable number.

729638149 is a deficient number, since it is larger than the sum of its proper divisors (1).

729638149 is an equidigital number, since it uses as much as digits as its factorization.

729638149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 729638149 is about 27011.8149890006. The cubic root of 729638149 is about 900.2625361662.

The spelling of 729638149 in words is "seven hundred twenty-nine million, six hundred thirty-eight thousand, one hundred forty-nine".